	US 12,077,443 B2
	Silica particles and method for producing the same
Yuka Zenitani, Kanagawa (JP); Sakae Takeuchi, Kanagawa (JP); Koji Sasaki, Kanagawa (JP); Yoshifumi Eri, Kanagawa (JP); and Mai Mochida, Kanagawa (JP)
Assigned to FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed by FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed on Feb. 2, 2022, as Appl. No. 17/649,692.
Claims priority of application No. 2021-052444 (JP), filed on Mar. 25, 2021; and application No. 2021-156195 (JP), filed on Sep. 24, 2021.
Prior Publication US 2022/0315431 A1, Oct. 6, 2022
Int. Cl. C01B 33/149 (2006.01)

CPC C01B 33/149 (2013.01) [C01P 2002/86 (2013.01); C01P 2004/32 (2013.01); C01P 2004/62 (2013.01); C01P 2004/64 (2013.01); C01P 2006/16 (2013.01)]

17 Claims

1. Silica particles comprising:

a nitrogen-containing compound,

wherein, when A is a volume of pores having a diameter of 1 nm or more and 50 nm or less before the silica particles are baked at 350° C. and B is a volume of pores having a diameter of 1 nm or more and 50 nm or less after the silica particles are baked at 350° C., the volumes being determined from a pore size distribution curve obtained by nitrogen gas adsorption, B/A is 1.2 or more and 5 or less and B is 0.2 cm³/g or more and 3 cm³/g or less, and

wherein the pores are composed of a product of a reaction of a trifunctional silane coupling agent, and

wherein the nitrogen-containing compound is at least one selected from the group consisting of a quaternary ammonium salt including molybdenum and a mixture of a quaternary ammonium salt with a metal oxide including molybdenum.